Fix operator precedence error in drawVerticalLine

igrr · igrr · commit 3759e51365fa · 2016-07-10T14:46:13.000+08:00
diff --git a/OLEDDisplay.cpp b/OLEDDisplay.cpp
@@ -278,7 +278,7 @@ void OLEDDisplay::drawVerticalLine(int16_t x, int16_t y, int16_t length) {
   }
 
   if (length > 0) {
-    drawBit = (1 << length & 7) - 1;
+    drawBit = (1 << (length & 7)) - 1;
     switch (color) {
       case WHITE:   *bufferPtr |= drawBit; break;
       case BLACK:   *bufferPtr &= drawBit; break;

Original file line number	Diff line number	Diff line change
`@@ -278,7 +278,7 @@ void OLEDDisplay::drawVerticalLine(int16_t x, int16_t y, int16_t length) {`
`278`	`278`	`}`
`279`	`279`
`280`	`280`	`if (length > 0) {`
`281`		`- drawBit = (1 << length & 7) - 1;`
	`281`	`+ drawBit = (1 << (length & 7)) - 1;`
`282`	`282`	`switch (color) {`
`283`	`283`	`case WHITE: *bufferPtr \|= drawBit; break;`
`284`	`284`	`case BLACK: *bufferPtr &= drawBit; break;`